On Sunday, 18 February 2018 at 14:48:59 UTC, Cym13 wrote:
[...]
Just thought of a much better/simpler solution for that last case that also doesn't force you to read all data (which might be impossible when dealing with infinite ranges):
import std.range; import std.algorithm; a[] .enumerate // get tuples (index, value).filter!(t => t[1] == "Test2") // keep only if value == "Test2"
.map!(t => t[0]) // keep only the index part .writeln; Completely lazy.